In one of the videos a French speaking Isil fighter describes the Nice events, for which Isil claimed responsibility on July 16, and how the attack was carried out by an "inspired Muslim," identified as Mohamed Lahouaiej Bouhlel.

He then calls on others to follow the Bouhlel's example and hit France, "whose air force continues to kill innocent Muslims in Iraq and Syria."

In the 2014 speech Adnani urged Muslims to "kill a disbelieving American or European – especially the spiteful and filthy French," using "any manner" they could find.

Two French-speaking Isil fighters speaking in the Wilayat Nineveh video

In a second video, released by Wilayat Nineveh, two French-speaking Isil fighters address France's president Francois Hollande and threaten to "intensify" the attacks in the country.

They also claim the Nice attacks are proof of the terrorist organisation's capabilities before proceeding to behead two men who they claim are Iraqi Shiite soldiers that were captured in recent operations in Nineveh Province.

The video then shows locals saying that people in Nice "had it coming to them for bombing our homes."

Experts believe that even though Isil claimed Bouhlel as one of their "soldiers" there is no evidence of him having any links with the terrorist group.